Results 11 to 20 of about 125 (96)

Urban landscapes tend to increase the presence of pathogenic protozoa, microsporidia and viruses, but likely decrease the abundance of viruses in wild bees and wasps. [PDF]

Insect Sci
• The bees Anthophora plumipes and Osmia cornuta had a higher occurrence probability of the neogregarine protozoan Apicystis bombi in more fragmented urban areas.• In the bee Halictus scabiosae and wasp Polistes dominula, hotter urban areas increased the likelihood of occurrence of viruses.• The viruses were found to be replicative in the samples, and ...
Ferrari A, Cilia G, Polidori C.
europepmc   +2 more sources

Urbanization Shifts Immunometabolism in a Common Bumblebee. [PDF]

Ecol Evol
Cities provide contrasting habitats for pollinators and it proves difficult to predict the overall effect of urban living on the health of wild bees. By combining measurements of local competition, pathogen pressures, and exposure to pollutants along an urbanization gradient, we evidenced an upregulation of genes involved in immunometabolism in bees ...
Cuvillier-Hot V, Fisogni A, Doublet V, Guillot S, Holl AC, Leclercq-Dransart J, Occelli F, Piquot Y, Hautekèete N.   +8 more
europepmc   +2 more sources

Lactic acid bacteria in Swedish honey bees during outbreaks of American foulbrood. [PDF]

Ecol Evol
To investigate if the bacterial disease American foulbrood (AFB) affects lactic acid bacteria (LAB) in honeybees, adult bees were collected from colonies with and without AFB during outbreaks in Sweden. We found differences in the abundance of the individual LAB between the different outbreaks.
Nilsson A, D'Alvise P, Milbrath MO, Forsgren E.   +3 more
europepmc   +2 more sources

Urban habitat fragmentation and floral resources shape the occurrence of gut parasites in two bumblebee species

Ecology and Evolution, Volume 13, Issue 7, July 2023., 2023
Urbanization and the expansion of human activities foster radical ecosystem changes with cascading effects also involving host‐pathogen interactions. Urban pollinator insects face several stressors related to landscape and local scale features such as green habitat loss, fragmentation and availability reduction of floral resources with unpredictable ...
Nicola Tommasi, Beatrice Colombo, Emiliano Pioltelli, Paolo Biella, Maurizio Casiraghi, Andrea Galimberti   +5 more
wiley   +1 more source

Bumble bee colony health and performance vary widely across the urban ecosystem

Journal of Animal Ecology, Volume 91, Issue 10, Page 2135-2148, October 2022., 2022
Urbanization can affect species diversity. Yet, whether urbanization affects fitness remains largely neglected. This experiment using bumblebee colonies reveals strong relationships between temperature and landscape‐scale drivers and colony health, performance and reproductive success, suggesting that environmental heterogeneity within the urban ...
Panagiotis Theodorou, Olga Kühn, Lucie M. Baltz, Christopher Wild, Sirus Leonard Rasti, Carolina Ruiz Bucksch, Erhard Strohm, Robert J. Paxton, Christoph Kurze   +8 more
wiley   +1 more source

The puzzle of monarch butterflies (Danaus plexippus) and their association with plants containing pyrrolizidine alkaloids

Ecological Entomology, Volume 46, Issue 5, Page 999-1005, October 2021., 2021
1. The chemical defences of monarch butterflies involve two kinds of secondary plant metabolites: cardiac glycosides (CGs) that are obtained from larval hostplants, and pyrrolizidine alkaloids (PAs) that are gathered by adults usually independent from feeding behaviour.
Nancy Lawson, Richard I. Vane‐Wright, Michael Boppré   +2 more
wiley   +1 more source

Multiplex PCR detection of slowly‐evolving trypanosomatids and neogregarines in bumblebees using broad‐range primers [PDF]

Journal of Applied Microbiology, 2010
The aims of this study were to design universal markers for different protozoan parasites of Bombus spp. based on the phylogenetic position of two important bumblebee parasites Crithidia bombi and Apicystis bombi.Standard PCR and extraction techniques were used to amplify and sequence 18S rDNA.
I, Meeus, D C, de Graaf, K, Jans, G, Smagghe   +3 more
openaire   +2 more sources

First record of the entomopathogenic protist, Mattesia dispora (Neogregarinorida: Lipotrophidae) of the Mediterranean flour moth, Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) in Turkey

Egyptian Journal of Biological Pest Control, 2019
The present study is the first record of a natural neogregarine infection of Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) in Turkey. The infection occurs in the fat body and hemolymph of the larvae.
Mustafa Yaman, Kâbire Funda Acar, Renate Radek   +2 more
doaj   +1 more source

Positive‐Strand RNA Viruses Infecting the Red Imported Fire Ant, Solenopsis invicta

Psyche: A Journal of Entomology, Volume 2012, Issue 1, 2012., 2012
The imported fire ants, Solenopsis invicta and S. richteri were introduced into the USA between 1918 and 1945. Since that time, they have expanded their USA range to include some 138 million hectares. Their introduction has had significant economic consequences with costs associated with damage and control efforts estimated at 6 billion dollars ...
Steven M. Valles, Alain Lenoir
wiley   +1 more source

Museum collections reveal a global range of Ophryocystis parasites in Danaus butterflies

Ecological Entomology, Volume 50, Issue 3, Page 552-564, June 2025.
We analysed 2727 museum specimens from 61 butterfly species across 86 countries to document the occurrence and host range of Ophryocystis elektroscirrha (OE) and related parasites in milkweed butterflies. Ophryocystis parasites infected Danaus petilia (16%), D. plexippus (12%), D. chrysippus (11%), D. gilippus (4%) and D.
Maria L. Müller‐Theissen, Paola Barriga, Katie Yan, Nicole L. Gottdenker, Sonia M. Altizer   +4 more
wiley   +1 more source